Planooractl co



J. S. WILLIAMS.

WRENCH.

APPLICATION mm rza. u. |9|9.'

Patented Oct. 7, 1919.

Hi5 COLUMBIA PLANOGRAPI'I :0 WASHINGTON D c isiaeat.

. JARVIS S.WILLIAMS, OF DANBURY, CONNECTICUT.

WRENCH.

Application filed February 14, 1919. Serial No. 276,893.

To all whom it may concern:

Be it known that I, JARVIS S. WILLIAMS, a citizen of the United States, residing at the city of Danbury, county of Fairheld, and State of Connecticut, have invented certain new and useful Improvements in Wrenches; and I do declare the followlng to be afull, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. i

This invention relates to certain new and useful improvements in a Wrench of the monkey type, and it resides in an improved construction whereby a more positive setting of the movable jaw against the work maybe obtained. 7 a

The invention consists in mounting a rotatable cam on the shank of the wrench for jamming against the adjacent end of the jaw-setting screw to supplement 1ts adjustment, and rotatably connecting the handle of the wrench to its shank and then connecting the handle to the cam whereby the latter Being of the monkey type of wrench, the

shank 1 carries a fixed jaw 2 at one end and slidably' supports the movable jaw 3 for adjustment, relative to the fixed jaw,

through the instrumentality of the screw 4. One of the projections 5, which extends from opposite sides of the shank is formed with a journal bearing for the reduced stem extension 6 of the screw 4 which protrudes therethrough. Above the bearing projection 5 a knurled nut 7 is fixed on the adjusting screw and has its periphery operating in a notch or recess 8 in the shank, said recess being slightly wider than 'the nut to,

permit limited axial movement thereof.

The handleportion of the shank, from the projections 5, is round'in cross section and tapers longitudinally although the part immediately adjacent said projections may be cylindrical to rotatably support a cam disk 9, the same being formed in its upper face with a concentric cam groove 10 in which Specification of Letters Patent.

the rounded nose or end of stem extension 6 rides. This cam groove may extend in both directions so that rotation of the disk in either direction will setthe jaw.

, Depending from the underside'of the cam disk is an annular sleeve 11 extension spaced from the shank to receive the reduced upper end of handle 12 where it is securely fastened by screws 13. The handle is rotatable on the tapering shank portion 14: and is retained thereon by a nut 15 threaded on the protruding end 16 of said shank. By this arrangement the handle and its fixed cam disk are held between the projections 5 and the nut 15 against longitudinal movement on the shank.

The operation is very obvious from the foregoing, the jaw 3 being initially set by operating the knurled nut and then, to take up any looseness or play incidental to monkey wrench adjustments, the handle 12 is turned on the shank portion 14 to rotate the cam disk underneath the protruding end of the screw extension 6. This operation jams the screw longitudinally and the movable jaw firmly against the work. By reason of the supplemental adjustment being efiected by simply turning or rotating the handle, the operation may be performed very expeditiously and with facility.

Wrenches having cam adjustments have heretofore beenpatented but the only means for actuating the cam were located well up on the shank and were operated by the fingers. It frequently happens that the nut or work is in an almost inaccessible position and therefore it is difficult to manipulate the wrench or its adjustment. However, with the present construction it is merely necessary to give the always accessible handle a. slight twist to firmly grip the nut or work.

What is claimed is 1. A wrench comprising a shank having a fixed jaw on one end, integral projections extending from opposite sides of the shank at an intermediate point, said shank from adjacent said projections tapering toward the opposite end and being round in cross section, a movable jaw on the shank between the fixed jaw and said projections, a screw for setting the movable jaw, a knurled nut carried by the screw and engaging in a notch of the shank, said screw having a stem extension journaled in and projecting through one of the projections, a cam disk rotatable on the shank and engaging the protruding stem extension, and a wrench handle rotatable on the tapered portion of the shank and fixedly connectedto the ca-mdisk'foroperating the latter.

2. A wrench comprising a shank having a fixed jaw on one end, integral projections extending from opposite sides of the shank at an intermediate point, said shank from adjacent said projections tapering toward the opposite end and being round .in cross section, a movable jaw on the shank between the fixed jaw and said projections, a screw for setting the movable jaw, a knurlednut "rotatable on the tapered portion of the shank and carrying a cam part acting against the protruding stem extension to 20 shift the screw axially.

In testimony whereof I aflix my signature.

JARVIS S. WILLIAMS.

WVitnesses: 1

"EDWARD lVIAODERMOTT, DANIEL H. OHARA.

Copies of this patent may beobtained for five cents each", by addressing the Commissioner of latents.

Washington, D. G. 

